Meaning:
1st-class mail 
n.
mail that includes letters and postcards and packages sealed against inspection
AI Idiom, Proverb
a breath of fresh air
a nice change, a new presence Having Lan around the house is a breath of fresh air - she's so nice.
a fair shake
a fair deal, a just settlement The insurance company gave us a fair shake - paid all our damages.
a fraidy cat
a child who is afraid to jump etc., chicken """Ian's a fraidy cat!"" the boys shouted. ""Ian's afraid to jump!"""
a fresh pair of eyes
a different reader, one who has not seen the writing A fresh pair of eyes may find many errors in this report.
a grain of salt
(See take it with a grain of salt)
a grain of truth
a bit of truth, take it with a grain... There's not a grain of truth in what Brian says. It's all untrue.
a little hair off the dog
(See hair off the dog)
a nail-biter
"exciting game or movie; having much suspense" Have you seen the movie The Fugitive? It's a nail-biter.
a pain in the ass
a bother, a lot of trouble Fixing that car every day is a pain in the ass.
a pain in the butt
a person who causes problems, a pain in the ass Hal keeps interrupting me. He's a pain in the butt!
a paper trail
a series of memos or letters that record events A business merger leaves a long paper trail - many documents.
a piece of tail
(See a piece of ass)
a royal pain
a feeling of irritation, a pain in the ass When he brags about his wealthy family, he gives me a royal pain.
afraid so
"sorry, but it is true; believe me, yeppers" """Did he spend all of our money?"" ""Yes, 'fraid so."""
against all odds
not likely to happen, a slim chance Against all odds - poor weather, student pilot - we landed safely.
against the grain
against the natural way, rub the wrong way Some words go against the grain. Their spellings aren't natural.
AI
Artificial Intelligence - used for robots etc Several professors at our university have been researching AI for many years now.
AIDS
Acquired Immune Deficiency Syndrome - a disease of the immune system Recently the number of AIDS patients has been increasing rapidly in many countries.
ain't
"isn't, is not; aren't, are not" """It ain't easy being green,"" said the frog."
air one
make public something embarrassing that should be kept secret The dinner party became uncomfortable when the host began to air his colleagues' dirty laundry in public.tell about one
air rage
angry or violent passengers on an airplane The man struck one of the attendants. It was air rage.
air was blue
(See the air was blue)
airhead
(See an airhead)
all's fair in love and war
there are no rules to guide you in love or war, that's life When your girlfriend leaves you for your best friend, remember, All's fair in love and war.
an airhead
a person who talks without thinking, a fool Sally is such an airhead. She said that chicklets are baby chickens.
another nail in your coffin
"another cigarette; harmful substance" Every cigarette he smoked was another nail in his coffin.
as right as rain
(See right as rain)
as slow as a dead snail
unbeatable in slowness He writes as slow as a dead snail, only a word or two per day!
at it again
doing it again, back at it That dog is at it again - barking in the middle of the night.
bail a company out
help or rescue a company with financial problems The government decided to bail out the failing bank in order to maintain stability in the economy.
bail me out
help me solve a problem, pay to get me out of jail If they arrest me, will you bail me out - pay the bail money?
bail out
quit, leave a project Tom bailed out when Lan became Project Manager.
bail someone or something out
help or rescue The government has decided to bail out the troubled bank.
beat one's brains out
try very hard to understand or do something.
beat your head against a stone wall
try an impossible task, work on a futile project Preventing war is like beating your head against a stone wall.
best laid plans
(See the best-laid plans)
beyond repair
ruined, cannot be repaired, a lost cause That copier is wrecked. It's beyond repair.
birdbrain
a person with a tiny brain, dumbo Hey, birdbrain. Why are you throwing money in the river?
brain
(See what a brain)
brain drain
emigration of intelligent people If Canada's best professors move away, it's called a brain drain.
brain is fried
brain is very tired or ruined by drug abuse After writing six exams, my brain was fried - too much studying!
brain storm
think of ideas together, think tank Our family decided to brain storm the problem of wasting food.
brain traffic
thoughts and information moving through the brain I wish I could turn off my mind when brain traffic is too heavy.
breath of fresh air
(See a breath of fresh air)
bright eyed and bushy tailed
frisky, lively, full of life Perry is bright eyed and bushy tailed tonight. He looks rested.
can't make heads or tails of something
" can't understand something at all;"
captain of industry
a top corporation officer The president of our company was a captain of industry and after he retired he was appointed to many government boards.
catch a plane/bus/train
go to the airport and get on the plane After the meeting, you can catch the plane to Toronto.
chain letter
a letter that is copied and sent to other people This letter says I will have bad luck if I break the chain.
chain of command
order of those in power, line of authority If you are a lieutenant, the chain of command goes up and down.
An AI idiom dictionary is a great resource for writers, students, and anyone looking to expand their vocabulary. It contains a list of words with similar meanings with AI, allowing users to choose the best word for their specific context.
Dictionary of similar words, Different wording, Synonyms, Idioms for Idiom, Proverb AI